ISSN:
0030-493X
Schlagwort(e):
Chemistry
;
Analytical Chemistry and Spectroscopy
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Electron impact (El) ionization and positive and negative liquid secondary ion mass Spectrometry (pLSIMS and nLSIMS) of eight charge-transfer complexes of 7,7′,8,8′-tetracyanoquinodimethane (TCNQ)-aromatic systems and of the individual π-donors and -acceptors was examined. The El spectra exhibited the molecular ions of both the donor and the acceptor of each complex. The molecular ion of the π-donor was observed in pLSIMS using m-nitrobenzyl alcohol (NBA) if its oxidation potential is lower than 1.2 V, but when the oxidation potential is higher than 1.9 V, no molecular ion was detected. On the other hand, nLSIMS exhibited the molecular ion of TCNQ in all cases. Participation of an excited state of NBA in the ionization process is suggested.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/oms.1210271206
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